Topic summary
Acoels
Extracted from the Wikipedia article Acoela.
Description
Acoels are very small, flattened worms, usually under 2 millimetres (0.079 in) in length, but some larger species, such as Symsagittifera roscoffensis, may reach up to 15 millimetres (0.59 in). They are bilaterally symmetric and microscopic.